Leather-skiving machine



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A. E. PERRY. LEATHER SKIVING MACHINE. No. 518,790. Patented Apr. 24,1894.

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Patented Apr. 24, 1894.

A. E. PERRY. LEATHER SKIVING MACHINE.

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A. E. PERRY.

LEATHER SKIVING MACHINE. NO. 518,790. Patented Apr. 24,1894.

WTNESSES; INVENTIJRIJ UNITED STATES" PATENT OFFICE.

AUSTIN E. TERRY, OF WAKEFIELD, ASSIGNOR TO GEORGE H. P. FLAGG, OFBOSTON, MASSACHUSETTS.

LEATHER-SKIVIN'G MACHINE.

SPECIFICATION forming part of Letters Patent No. 518,790, dated April24, 1894. Application filed January 3, 1894. Serial No. 495,544- (Nomodel.)

To all whom it may concern:

Be it known that I, AUSTIN E. BERRY, of Wakefield, in the county of'Middlese'x and State of Massachusetts, have invented certain new anduseful Improvements in Leather- Skiving Machines, of which the followingis a specification.

This invention relates to machines for beveling or skiving pieces ofleather, and particularly spring heelsfor boots and shoes, a spring heelbeing composed of a lift or heelblank having a tapering breast-portionformed by the action of the machine to which my improvements relate.

The invention has for its object to provide a machine adapted to form askived or beveled surface of any desired degree of inclination on aspring heel blank or lift, and it consists in the several improvementswhich I will now proceed to describe and claim, said improvementsrelating particularly to the gage which determines the position of thebreast of the blank with relation to the cutting devices and to theclamp which holds the blank against the rest which supports the'blankagainst the action of the cutting knife.

Of the accompanying drawings, forming part of this specification: Figure1 represents a side elevation of a skiving-niachine embodying myimprovements, showing the knife in the act of making its forward stroke.Fig. 2 represents a top view, showing the machine in the positionindicated in Fig. 1; Fig. 3

represents a partial top view, the knife being in the position shown inFig. 2. Fig. 4 represents a section on line 55 of'-Fig. 3. Fig. 5represents a sectionion line 6-6 of Fig. 5. Fig. 6 represents aperspective view of a spring heel blank, the breast of which is formedby the action of the machine.

The same letters of reference indicate the same parts in all thefigures.

In the drawings: it represents an inclined bed or table, supported bylegs a a.

of the table a, the other, b, being formed di-" rectly in said bed ortable.

0 represents a knife, afiixed to the carriage At one edge of said tableare guides b b, in which a shearing-edge (1', shown most clearly in Fig.

4, which coincides with the path of the knife, so that, as the knifemoves along, its cuttingedge will cooperate with the said shearingedge din severing the projecting portion of the blank e. The shearing-edge dis at the center of the arc in which the rest at is adjustable on thebed a, means being provided whereby the rest may be adjusted-so as tostand at any desired angle with reference to the knife, and thus causethelatter to form the breast of the heel at any desired angle with thetop and bottom surfaces thereof.

The means here shown for' adjusting and securing the rest are asfollows: The rest, which is preferably composed of the rest proper d,which is a plate of hardened steel having the shearing-edge abovedescribed,"

and a holder or support d to which said rest is attached by screws d isconnected by a screw (1 with a socketed stud (1 formed on a plate dwhich is located below the bed or table a. The stud d projects upwardlythrough a segmental slot (1 in the table a, and isprovided with twostuds having antifriction rollers 01 d projecting upwardly into asegmental slot (1 formed in the bed a, the

slots 61 and d being concentric with each other and with the line of theshearing-edge d. When the screw d is loosened, the breast and the blank12 may be moved in the arc of a circle, the stud d and rolls d movingfreely in the segmental slots until the desired adjustment has beeneffected, when the screw d may be tightened. A spring-latch or bolt almay be employed, in conjunction with a series of orifices 01 in thetable a, to secure the rest at various points inits adjustment.

f represents a gage, which is connected by hinges or pivots at f f withthe work-rest. The swinging edge of said gage has a lip or flange fformed, as shown in Fig. 3, to project across the shearing-edge of therest and thus hold the breast or forward edge of the blank in the properposition with relation to I said edge before the blank is skived. The

gage is normally held out of its operative position, as shown in Fig. 4,by gravitation, 5 caused by the inclination of the table a and thework-rest d, and means are provided for moving it to its operativeposition by the backward movement of the knife-carriage, so that, whenthe operator moves the knife back preparatory to the operation of themachine,

this movement will place the gage in its operative position, ready toposition the blank. The knife-carriage is provided with a gagemovingdevice, which, as here shown, is a x 5 slide 1, movable in a groove orway formed for its reception in the carriage c, and provided at itsforward end with an elongated finger d, projecting across the path inwhich the knife moves, and arranged to bear against a stud or projectionf on the gage, the arrangement being such that, when the gage is out ofits operative position and the knife is being retracted or moved in thedirection indicated by the arrow in Fig. 4c, the finger t" willstrikethe projection f and thusdraw the gage to its operative positionagainst the rest. The slide 2' is connected with the carriage c by meansof a spring 2' which enables the slide to yield after the gage has 0been brought to its operative position and during the completion of thebackward movement of the knife-carriage, so that the slide t' holds thegage yieldingly in its operative position. \Vhen the knife is moved for-5 ward, the spring at first holds the slide and gage in the operativeposition of the latter until the rear end of the slot in the carriage,which receives the slide, strikes the rear end of the slide, the slidethen moving forward 4c with the carriage and permitting the gage toswing away from the rest, as shown in Fig. 4:. It will be seen,therefore, that the gage is antomatically moved both to and from itsoperative position, and requires no attention on 5 the part of theoperator.

3' represents a clamp, which is a bar, the ends of which are fitted toslide in guides or ways formed for it in a frame (1 in the table a. Tothe clamp is affixed a rod j, passing through a fixed ear or guide j therear end of said rod being screw-threaded.

represents a spring, interposed between a shoulder on the rod j and theuide said spring acting to press the clamp j forward to- 5 5 ward therest cl.

9' represents a nut or head, engaged with the screw-threaded portion ofthe rod j, and

arranged to abut against the guide j and thus limit the forward movementof the clamp by the spring 7' By adju ti said tj i the clamp can beadjusted to the thickness of the blank or lift to be skived. The head ornut is arranged to come in contact with an ear or projection c on thecarriage c when the latter is being retracted, said ear striking the nutduring the backward movement of the carriage, and moving the latter withthe rod j and the clamp, thus removing the clamp from the lift or pieceof work and permitting the latter to be removed after the skivingoperation. The knife-carriage and knife may be moved by any suitablemeans, I have here shown as the operating means a lever 70, alfixed to agear-segment which meshes with a rack 70 affixed to the carriage c,movements of said lever produced by the hand of the operator movin g thecarriage back and forth, as will be readily seen.

I claim 1. In a leather skiving machine, the combination of a supportingbed or table, a knife carriage movable in guides or ways thereon andprovided with a trimming knife, a work restadji stable inqthe arc of acircle on said table and having a shearing edge coinciding with the pathof the knife, a gage pivotally connected tosaid rest and formed toproject,

with the path of the knife, a gage which is pivotally connected with therest and projects across said shearing edge when in its operativeposition, and a slide movable with the knife carriage and having anelongated finger formed to engage a projection on the gage and draw thelatter to its operative position when the knife is being retracted, saidslide being yieldingly connected with the knife so that it may yieldduring the backward movement of the knife after bringing the gage to itsoperative position, as set forth.

3. In a leather skiving machine, the combination of an inclined bed ortable, having guides or ways, a knife carriage and knife movable in saidguides, a work rest adjustable in the arc of a circle on said table andhaving an inclined shearing edge standing at right angles with thetable, a gage pivotally connected with the said rest and formed toproject over said shearing edge when in its operative position, theinclination of said edge causing the gage to normally swing away fromits operative position by gravitation, and a slide movable with theknife carriage and having an elongated finger formed to bear on aprojection on the gageand'draw the latter to itsoperative position whenthe knife is being retracted, said finger releasing the gage when theknife is moved forward, as set forth.

4. In a leather skiving machine, the combination of a supporting bed ortable, a knife carriage movable in guides or ways thereon and providedwith a trimming knife, a Work rest adjustable in the arc of a circle onsaid table and having a shearing edge coinciding with the path of theknife, a clamp movable toward and'from said rest in guides beside thepath of a knife, a rod affixed to said clamp and passing through a fixedear or guide, the rear end of said rod being screw threaded,,a spring onsaid rod interposed between the said clamp and guide and adapted topress the clamp toward the rest, and an adjustable nut or head engagedwith the threaded end of the rod and adapted to regulate the forwardmovement of the clamp, said nut or head being arranged to project intothe path of the knife carriage, so that the retracting movement of saidcarriage also retracts the clamp, as set forth.

5. In a leather skiving machine, the combination of the table having theconcentric slots 01 al the block 01 engaged as described with saidslots, and the work rest having a shearing edge and detachably connectedwith AUSTIN E. PERRY.

Witnesses:

vC. F. BROWN, A. H. BROWN.

